Fluorine (C-F) — FTIR absorption peaks and assignments

Quick answer

Fluorine (C-F) is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.

Characteristic FTIR peaks for Fluorine (C-F)

Showing the 30 best-supported peaks of 131 total for Fluorine (C-F).

Spectrum logic

A functional-group assignment becomes more confident when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.

Real-world usage

These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.

Common mistakes

• Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
• Assuming the strongest band is always the most diagnostic one.
• Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.

Verification advice

Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.

Literature behind these assignments

• 1057 cm⁻¹ confidence 1.0

  “Another typical absorption cm-1 band of TA at 1057 is due to the stretching vibration of C-F.”

  Chitosan-Coated PLGA Nanoparticles Encapsulating Triamcinolone Acetonide as a Potential Candidate for Sustained Ocular Drug Delivery DOI: 10.3390/pharmaceutics13101590
• 1297 cm⁻¹ confidence 1.0

  “O-H bending vibration C-O 1297 1338 C-O stretching vibration C-F”

  Ganie 等 - 2020 - Synthesis and Characterization of a New Surface-Mo DOI: 10.1155/2020/8814260
• 1043 cm⁻¹ confidence 1.0

  “The transmittance bands at 1043.15 and 944.89 are due to C=C and C-F stretching respectively.”

  Haq 等 - 2018 - Fabrication of pure and moxifloxacin functionalize DOI: 10.1016/j.jphotobiol.2018.07.011
• 1147 cm⁻¹ confidence 1.0

  “The untreated by Ar gas plasma includes element of fluorine, carbon, and PTFE surface showed peaks of C-F groups at the 1147 and cm-1(Fig.”

  Lien 等 - 2011 - Preparation of glass fiber clothes reinforced poly DOI: 10.1007/s10965-010-9474-5
• 1063 cm⁻¹ confidence 1.0

  “Z.Mahmoodetal./SpectrochimicaActaPartA65(2006)445-452 451 558cm-1are 1063cm-1 to MCO bending vibration and band observed at and the C-F stretching bands are found at 1045 and”

  Mahmood 等 - 2006 - Comparative vapour phase FTIR spectra and vibratio DOI: 10.1016/j.saa.2005.11.024
• 530 cm⁻¹ confidence 1.0

  “cm-1 cm-1 cm-1 brations at 3639 cm-1 for -OH, 2860 cm-1 for -C-H, 2487 cm-1 for -C≡C-, 1625 cm-1 for -N-H, -C≡C-, vibrations at 3639 for -OH, 2860 for -C-H, 2487 for 1625 for cm-1 cm-1 cm-1 for -COOH, 1053 cm-1 for -C-F, and 530 cm-1 for Ca”

  Biosynthesis and Characterization of Calcium Oxide Nanoparticles from Citrullus colocynthis Fruit Extracts; Their Biocompatibility and Bioactivities DOI: 10.3390/ma16072768
• 1095 cm⁻¹ confidence 1.0

  “cm-1 cm-1 stretching vibrational bonds were observed at 1021 Furthermore, the peaks observed at 1095 and 1244 show amorphous phase of PVDF and stretching frequency of C-F bond.”

  Phogaat 和 Yepuri - 2023 - Performance enhancement of triboelectric nanogener DOI: 10.17586/2220-8054-2023-14-1-69-73
• 1271 cm⁻¹ confidence 1.0

  “The peak at about 1271 and 3478 were due in CP2, TP1, to OH stretching vibration of free acid groups and N-H TP2 and TP3 was assigned to C-F vibration.”

  Purushothaman 和 Bilal - 2014 - Development and characterization of homo, co and t DOI: 10.1515/polyeng-2013-0167